laburnum

As a noun terms

is .

As a proper noun laburnum is

.

As a proper noun laburnum

is .

As a noun alburnum is

sapwood; the soft, newer wood in the trunk of a tree found between the bark and the hardened heartwood; it is often paler in color than the heartwood, hence the name alburnum .

As a proper noun laburnum

is .

As a noun laburnine is

(organic compound) a poisonous alkaloid found in the unripe seeds of the laburnum.